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公开(公告)号：EP1560877B1
公开(公告)日：2009-12-16
申请号：EP03758019.8
申请日：2003-10-18
申请人： BASF SE
CPC分类号： B01F7/00758 , B01F3/1221 , B01F7/164 , C08K3/22 , C08K2003/2241 , C08L77/00
摘要： Disclosed is a method for producing a polyamide containing titanium dioxide pigments. Said method is characterized by the fact that titanium dioxide pigments are dispersed in an initial mixture containing water and caprolactam by means of a device comprising a dispersion chamber, a disk-shaped rotor that is disposed inside said dispersion chamber, a stator that is provided with radial openings, is arranged within the dispersion zone of the dispersion chamber, and is connected to the rotor, a substance inlet located on each side of the rotor, preferably with a respective axial duct section such that the two flows of substance are combined in the peripheral edge area of the rotor disk, and a product outlet which is placed on the outer edge of the dispersion zone of the dispersion chamber, by feeding the titanium dioxide pigments to the dispersion chamber through one of said substance inlets while feeding the initial mixture containing water and caprolactam to the dispersion chamber through the other of said substance inlets, whereby a product mixture containing water, caprolactam, and the used titanium dioxide pigment is obtained via the product outlet, and the product mixture is polymerized so as to obtain a polyamide containing titanium dioxide pigments. Also disclosed are polyamides obtained according to the inventive method and the use of such polyamides as a masterbatch.
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2.发明公开
公开(公告)号：EP2376557A2
公开(公告)日：2011-10-19
申请号：EP09765113.7
申请日：2009-12-09
申请人： BASF SE
摘要： A process for continuously preparing copolyamides from lactams and salts of diamines and dicarboxylic acids, in which lactams are passed together with salts of diamines and dicarboxylic acids from the top downward through a vertical polymerization tube at polyamide-forming temperatures, is characterized in that a) an aqueous solution of lactams is mixed intensively with salts of diamines and dicarboxylic acids under elevated pressure which is greater than the vapor pressure of the mixture which forms in a mixing apparatus at a temperature of 80 to 300°C, b) the mixture thus obtained is supplied to a heated helical tube evaporator in which a liquid phase and a vapor phase form at a temperature of 140 to 300°C, a stream of steam and/or inert gas optionally being introduced into the mixture upstream of the helical tube, c) the vapor phase formed in stage b) is removed from the liquid phase and separated in a column into steam and into organic components comprising diamines, dicarboxylic acids and lactams, and the organic components are recycled into the polymerization, d) the liquid phase from the helical tube of stage b), mixed with the organic components of stage c), is passed from the top downward through a vertical polymerization tube at polyamide-forming temperatures to obtain a copolyamide.
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3.发明授权
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